Re: Passive Scanning Bugreport

On Tuesday 01 August 2006 07:49, Zhu Yi wrote:
>
> I suppose this only happens when card was associated right? It doesn't
> happen when it is not in the associate state (you can set an invalid
> ssid to verify). This can be explained by in the associated state, the
> STA is not able to be away from the currently associated channel without
> any time limitation (otherwise it causes packets lost while it is in
> other channels). Can you try to set the scan watchdog timer bigger
> (something like 20*HZ) to test whether you can finally receive the scan
> completed event or not?
Yes, the two previously mentioned scenarios happend when the card was 
associated with different access points. However, only if the card was 
associated with an enterasys access point the passive scanning worked. If the 
card was associated with other access points it did not work. See 
bugreport2_1.txt and bugreport2_2.txt.

I tried larger watchdog timerout values (till 20*HZ = 20 seconds), however, I 
faced the same problem (only the enterasys access point worked).

The beacon interval is set to 100ms for all access points.

If I set the essid value to something invalid, I am not able to perform a real 
passive scan because there are always active scans. The reason for this that 
the card is looking for my access point with the invalid essid. So, I 
replaced all active scans by passive scans inside the driver to see what 
happens. The results looked like expected: passive scans were performed (and 
of course completed).

So, my question is: does the execution of passive scans depend on any data the 
access point is setting inside the host's firmware???

Did you try to install my patch and did you perform passive scans with 
different access points? What is your result???

Frankly, I have no clue what causes this wired problem. Without your help I 
will be lost.

Greetings,
Thomas



>
> BTW, what are the beacon interval and listen interval setting for these
> APs?
>
> Thanks,
> -yi
>
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